import os
from win32com.client import Dispatch, constants, gencache, DispatchEx
import Excel_Style
import win32api
import win32con


class PDFConverter:
    def __init__(self, pathname, export='.'):
        self._handle_postfix = ['doc', 'docx', 'ppt', 'pptx', 'xls', 'xlsx']
        self._filename_list = list()
        self._export_folder = os.path.join(os.path.abspath('.'), 'pdfconver')
        if not os.path.exists(self._export_folder):
            os.mkdir(self._export_folder)
        self._enumerate_filename(pathname)

    def _enumerate_filename(self, pathname):
        """读取所有文件名"""
        full_pathname = os.path.abspath(pathname)
        if os.path.isfile(full_pathname):
            if self._is_legal_postfix(full_pathname):
                self._filename_list.append(full_pathname)
            else:
                raise TypeError('文件 {} 后缀名不合法！仅支持如下文件类型：{}。'.format(pathname, '、'.join(self._handle_postfix)))
        elif os.path.isdir(full_pathname):
            for relpath, _, files in os.walk(full_pathname):
                for name in files:
                    filename = os.path.join(full_pathname, relpath, name)
                    if self._is_legal_postfix(filename):
                        self._filename_list.append(os.path.join(filename))
        else:
            raise TypeError('文件/文件夹 {} 不存在或不合法！'.format(pathname))

    def _is_legal_postfix(self, filename):
        return filename.split('.')[-1].lower() in self._handle_postfix and not os.path.basename(filename).startswith(
            '~')

    def run_conver(self):
        '''
        进行批量处理，根据后缀名调用函数执行转换
        '''
        print('需要转换的文件数：', len(self._filename_list))
        for filename in self._filename_list:
            postfix = filename.split('.')[-1].lower()
            funcCall = getattr(self, postfix)
            print('原文件：', filename)
            funcCall(filename)
        print('转换完成！')

    def doc(self, filename):
        '''
        doc 和 docx 文件转换
        '''
        name = os.path.basename(filename).split('.')[0] + '.pdf'
        exportfile = os.path.join(self._export_folder, name)
        print('保存 PDF 文件：', exportfile)
        gencache.EnsureModule('{00020905-0000-0000-C000-000000000046}', 0, 8, 4)
        w = Dispatch("Word.Application")
        doc = w.Documents.Open(filename)
        doc.ExportAsFixedFormat(exportfile, constants.wdExportFormatPDF,
                                Item=constants.wdExportDocumentWithMarkup,
                                CreateBookmarks=constants.wdExportCreateHeadingBookmarks)

        w.Quit(constants.wdDoNotSaveChanges)

    def docx(self, filename):
        self.doc(filename)

    def xls(self, filename):
        '''
        xls 和 xlsx 文件转换
        '''
        # 拼接新pdf文件名
        name = os.path.basename(filename).split('.')[0] + '.pdf'
        exportfile = os.path.join(self._export_folder, name)
        # 修改Excel样式

        #  创建独立启动进程
        xlApp = DispatchEx("Excel.Application")
        # 后台运行，不显示，不警告
        xlApp.Visible = False
        xlApp.DisplayAlerts = 0
        # 打开文件和保存
        books = xlApp.Workbooks.Open(filename, False)
        books.ExportAsFixedFormat(0, exportfile)

        books.Close(False)
        print('保存 PDF 文件：', exportfile)
        xlApp.Quit()

    def xlsx(self, filename):
        self.xls(filename)

    def ppt(self, filename):
        '''
        ppt 和 pptx 文件转换
        '''
        name = os.path.basename(filename).split('.')[0] + '.pdf'
        exportfile = os.path.join(self._export_folder, name)
        gencache.EnsureModule('{00020905-0000-0000-C000-000000000046}', 0, 8, 4)
        p = Dispatch("PowerPoint.Application")
        ppt = p.Presentations.Open(filename, False, False, False)
        ppt.ExportAsFixedFormat(exportfile, 2, PrintRange=None)
        print('保存 PDF 文件：', exportfile)
        p.Quit()

    def pptx(self, filename):
        self.ppt(filename)


if __name__ == "__main__":

    while True:
        try:
            filename = './0011(1).xls'
            status = Excel_Style.ReadExcel(filename)
            if status is True:
                # 支持文件夹批量导入
                # older = 'tmp'
                pathname = os.path.join(os.path.abspath('.'))
                # 也支持单个文件的转换
                # pathname = 'test.doc'
                pdfConverter = PDFConverter(pathname)
                pdfConverter.run_conver()
                win32api.MessageBox(None, "数据转换pdf完成", "提示", win32con.MB_OK)
        except PermissionError as e:
            win32api.MessageBox(None, '请先关闭wps表格文件，两个进程发生冲突', 'error', win32con.MB_OK)